E4P7C
Corollary — Part IV
Latin
Affectus quatenus ad mentem refertur nec coerceri nec tolli potest nisi per ideam corporis affectionis contrariæ et fortioris affectione qua patimur. Nam affectus quo patimur nec coerceri nec tolli potest nisi per affectum eodem fortiorem eique contrarium (per propositionem præcedentem) hoc est (per generalem affectuum definitionem) nisi per ideam corporis affectionis fortioris et contrariæ affectioni qua patimur.
English (Elwes 1883)
An emotion, in so far as it is referred to the mind, can only be controlled or destroyed through an idea of a modification of the body contrary to, and stronger than, that which we are undergoing. For the emotion which we undergo can only be checked or destroyed by an emotion contrary to, and stronger than, itself, in other words, (by the general Definition of the Emotions) only by an idea of a modification of the body contrary to, and stronger than, the modification which we undergo.
Modern English
An affect, insofar as it is referred to the mind, can only be restrained or destroyed by the idea of a bodily affection that is contrary to and stronger than the affection we are undergoing. For the affect we undergo can only be restrained or destroyed by a contrary and stronger affect (E4P7), that is, (E3DA49), only by the idea of a bodily affection stronger than and contrary to the affection we are undergoing.